CF406

Enter valid SST registration number - …: letters, digits and dashes, at most two numbers separated by a semicolon, up to 35 characters, or NA.

error: the document is invalid

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

Context
/*/cac:AccountingSupplierParty/cac:Party | /*/cac:AccountingCustomerParty/cac:Party
Test
every $s in $sst satisfies (string-length(normalize-space($s)) le 35 and matches(normalize-space($s), '^(NA|[A-Za-z0-9-]+(;[A-Za-z0-9-]+)?)$'))

Checked with MyInvois e-Invoice